Cookie Policy

Cookies are small text files placed on your device by a website. They allow the website to recognize your device, remember your preferences, and provide a more personalized experience. Similar technologies include web beacons, pixels, and local storage.

Bichess uses the following categories of cookies:

• Essential — Required for the platform to function (authentication, security, language preferences). Cannot be disabled.
• Analytical — Help us understand how users interact with Bichess so we can improve the product (aggregated, anonymized data).
• Functional — Remember your preferences such as board theme or piece set.

Typical cookies you may encounter on Bichess:

• Session / auth cookies — maintain your logged-in state across page loads.
• bichess_boardTheme, bichess_pieceSet — store your board preferences.
• bichess_cookie_consent — records your cookie consent choice (essential or all).
• Payment provider cookies (Stripe) — used during checkout for fraud prevention.

When you first visit Bichess, a cookie consent banner will appear. You can choose to accept all cookies or restrict to essential ones only. You can change your preference at any time by clearing the bichess_cookie_consent cookie and refreshing the page.

You can also manage cookies directly from your browser settings. Most browsers allow you to block or delete cookies. Please note that restricting cookies may impact the functionality of certain Bichess features, including staying logged in.

• Chrome: Settings → Privacy and Security → Cookies.
• Firefox: Settings → Privacy & Security → Cookies and Site Data.
• Safari: Preferences → Privacy → Manage Website Data.
• Edge: Settings → Privacy, search, and services → Cookies.

We use an internal cookie named bichess_cookie_consent to store your consent choice. This cookie expires after 12 months and stores one of two values: 'essential' (you have declined non-essential cookies) or 'all' (you have accepted all cookies).